Full-Stack Web Development with Vue.js and Node

Introducing MongoDB Chapter 3

The comma operator means an AND operator. We can specify as many conditions as we like

with comma-separated values. The preceding command should output:

Now, specifying conditions with AND or comma operators is simple. If we want to use the

OR operator, then we should use:

> db.users.find(

{

$or: [ { email: "[email protected]" }, { name: "Mike" } ]

}

)

Here, we are saying: retrieve those documents for users whose name is Mike, and the email

can be [email protected] as well. The output is as follows:

Updating documents

Just like insert(), there are three methods of using the update() command in MongoDB:

updateOne(), updateMany(), and update().